Evaporating-pan.



No. 642,325. Patented 1an. 30, |900.

` F; E. HAYES.

EVAPRATING PAN.

(Application led Mar. 1, 1899.) l (No Model.) 2.Sheets-Shee 2.

HIHH I STATES PATENT OFFICE.

FLAVIUS E. HAYES, OF VICK, OHIO.

EVPORATlNG-l-PAN.

SPECIFICATION forming part of Letters Patent No. 642,325, dated January30, 1900.

Application filed March l, 1899. Serial No. 707,300 (No model.)

To a/ZZ whom it may concern.-

Be it known that I, FLAvIUs E. HAYES, a citizen of the United States,residing at Wick, in the county of Ashtabula and State of Ohio, haveinvented a new and useful Evaporator, of which the following is aspecification.

This invention relates to evaporator-s; and the object of the inventionis to provide a simple and eflieient apparatus of this character whereina high heat can be quickly developed to secure the rapid boiling of theliquid in the pans,Y thereby insuring a better product and necessitatingthe employment of a reduced amount of fuel as compared with that burnedin certain existing forms of apparatus of this type, and the device canbe used in the manufacture of niaple-sugar, salt, and sugar, and, infact, in any of the arts requiring a device of the character specified.

The apparatus involves in its construction two communicating tanks andwhat may be termed a finishing-tank, from Which the finished product isdrawn off, and I utilize the steam given off from one of the lirst-mentioned tanks as a means for heating the tinishing-tank, and thereby savewhat would otherwise be waste, and as a means for securing the highestefciency from such steam the pipe which conveys the same from theprimary to the final tank also passes through the nre-chamber, therebybeing further heated by the fire. While in practice beneficial resultsare obtained and the output of the apparatus is increased by the use ofthe steam connections before set forth, it is apparent that the lattercan in some cases be dispensed with and a finishing-tank other than thatj ust described employed.

With these ends in view the invention consists in the novel combinationof elements and in the construction and arrangement of parts, which willbe hereinafter fully described and claimed.

To enable others to understand the invention, l have illustrated thepreferred embodiment thereof in the accompanying drawings, forming apart of this specification, and in which- Figure 1 is a plan view of anevaporating apparatus constructed in accordance with my invention. Fig.2 is a longitudinal central section of the same. Fig. 3 is a transversesection taken in the line 3 3, Fig. 1. Fig. l is a transverse sectiontaken in the line 4 4 of Fig. 1.

Like characters denote like and corresponding parts in each of theseveral figures of the drawings.

The apparatus involves in its construction a furnace, which may be ofany suitable character. The furnace is designated by F, and it includesin its construction the fire-chainber 2 at the front end thereof and asmokepipe or chimney at the rear end thereof.

The evaporating-pans are designated by E and E', respectively, and theyare provided at their opposite sides with overhanging portions, as Il,adapted to rest upon the upper edge of the furnace, and the pans closelylit Within said furnace and abut against each other, as clearlyrepresented in Fig. 1. The front pan E is the primary pau and receivesthe liquid which boils therein and which Hows into the secondary or backpan E and from thence to a finishing-pau, hereinafter more particularlydescribed and represented herein as supported independently of thefurnace.

The liquid to be boiled is received from a suitable source of supply(not shown) and is conducted by a suitable piping system to the primarypan, and the piping passes through the lire-chamber 5 of the furnace,thereby initially heating the liquid.

The means for supplying the sap or other liquid to the primaryevaporating-pan E embodies a valve casing or chamber 6, having asupply-opening 7, controlled by the valve S. This valve-easing isconnected with the supply-tank by means of a pipe 9, a short section ofwhich is illustrated in Fig. 1, and it is also connected with theprimary pan E by means of the pipe or conduit 10, which can be lnade insections connected by couplings and which extend through thefurnace-chamber 5 below the secondary pan E, and the discharge end ofthe pipe 10 is located over the primary tank, whereby the liquid fromthe source of supply can flow into said tank E.

The supply ofsap or liquid is automatically controlled through theintervention of a float, as 12, located in the preferably cylindricaltank 13, secured to one corner of the secondary evaporating-pan E. Thefloat is provided with a vertical stem 14, which is pivotally IOOconnected with the stem l5 of the supply-controlling valve 8. The tank13 connects with the tank E by a short pipe 16, whereby the liquid canflow into the tank for the purpose. of elevating the float, andconsequently shutting o the valve to stop the supply of liquidautomatically when the maximum quantity has been supplied to the twocommunicating pans E and E. When the supply in said 'tanks goes belowthe predetermined standard,

the float 12 can, of course, drop, thereby opening the valve 8 andpermit a further supply of liquid.

The tank E is cross-sectionally corrugated, in which corrugations liethe hot-air iiues 17, constituting a part of said tank and arranged inparallelism longitudinally thereof, and the hot air from thetire-chamber 5 or the front end of the latter is adapted to enter thefront end of the hot-air tiues and to pass through the saine and intothe chimney or smoke-pipe 3. The primary pan E is cross-sectionallycorrugated and the corrugations are beveled, as at 18, upon their undersides next to the secondary tank E', thereby permitting the heated airfrom the fire-chamber to freely pass within the entering ends of thehot-air flues or pipes 17.

The chimney or smoke-pipe 3 is separated vertically into two iiues 19and 19', both of which communicate with the furnace lire- A chamber 5,and Pone of them communicates with the furnace through the hot-air flues17,whereby a separate draft system is maintained for the secondary tank,the air passing through the iiues 17 and from thence to thecommunicating flue 19. The chimney is thus separated by the verticalpartition 20, extending entirely across the same transversely thereofand also extending below the chimney and into the furnace and beingconnected with the side walls thereof and having a fo'rwardly-extendingflange or ledge 2l, adapted to cooperate with the Wide damper 22, whichis secured at its middle to the shaft 23, which is supported injournal-openings in the opposite walls of. the furnace and one end ofwhich is extended outward to form the handle by which said damper can beshifted. The flange 21 is horizontal and it is located substantiallymidway between the upper and lower edges of the furnace, whereby whenthe damper is in its open or horizontal position the different andsuperposed currents can pass through the furnace between the chimney andthe lire-box, one line of air-currents passing through the horizontalhot-air fines 17, forming a part of the tank E, and the otherair-currents passing into the chimney below the hot-air tubes or flues17 and communicating, respectively, with the chimneyflues 19 and 19 andpassing above and below the damper 22. By shifting the damper out of itssaid horizontal position the two dierent lines of draft can beregulated. By creating the two separate draft systems I am enabled tosecure the maximum amount of heat in the tire-chamber as well as tosecure the application of highly-heated air directly to the secondarytank.

The final tank or pan is designated by E", and it is represented asbeing supported independently of the furnace, and at this point I desireto state that this tank can in some cases be dispensed with and adifferent kind of iinishing-tank employed.

The final tank or pan receives the boiling liquid from the secondary orintermediate tank E', the short pipe 25, secured to the pan E and havingits discharge edge located over the tank or pan E", serving as aconvenient means for conducting the liquid.

The final or finishing tank E is provided with a series of dependinglegs 26, which are adapted to rest upon the floor or foundation of abuilding adjacent to the furnace, and the liquid within the same isheated by steam from one of the tanks sustained by the furnace F,thereby saving what would otherwise be waste.

The primary tank E is covered by a dome or hood 27, the space within thesame constituting a steam-chamber, and this dome or hood is provided atits upper side with the pipe 28' opening inward and which communicateswith the pipe 28, the latter in turn being connected with the nipple 29on one end of the finishing-tank. The tank E has a series oflongitudinal steam-pipes 30, which open into the chambers 31 and 32 atthe opposite ends of said tank, whereby steam which is generated in theprimary tank E can pass from the dome or hood 27 into the pipe 28, andfrom thence into the supply-chamber 3l of the finishing-tank, so that itcan pass through the steam-pipes 30, which lie in the corrugations ofthe bottom of the tank E". The steam when it leaves the pipes 30 entersthel exhaust-chamber 32, having a series of ports 33 for the escapethereof.

As a means for more highly heating the steam which collects in the hoodor dome 27, the pipe 28, which connects the same with the steam-supplychamber, extends entirely across the front end of the fire-chamber 2.The supply-pipe 28 includes in its construction a coil, as 34, of one ormore convolutions, which extends entirely across the furnace, wherebythe steam passing through the same will be heated to a high degreedirectly by the fire.

The final tank E is provided with a drawoff pipe 35, through which thecontents of said tank can flow and into suitable receptacles or cans andin condition for the market.

Changes in the form, proportion, size, and the minor details ofconstruction within the scope of the appended claims may be resorted towithout departing from the spirit or sacrificing any of the advantagesof this invention.

The evaporating-pan E consists of a number of separated sections, aswill be evident upon an inspection of Figs. 1 and 3, and

IOO

ceases a whether the bottom of this pan be plain or corrugated I employan air-iiue for each section, as will be also seen from said views.

I-Iaving thus described the invention, what I claim isl. In anevaporator, the combination with a furnace, of primary and secondarypans, the latter having a corrugated bottom, hotair fines lying in saidcorrugations and opening through the ends of the tank, a supplypipehaving its discharge end located to supply liquid to the primary pan, atank coinmunicating with the secondary pan, a float disposed in saidtank, and a valve in the supply-pipe connected with and operated by saidtank.

2. In an evaporator, the combination with a furnace, of primary andsecondary pans having open communication and both supported by thefurnace, to be heat-ed thereby, the secondary pan having alongitudinallycorrugated bottom, hot-air fines lying in saidcorrugations and opening through the ends of the pan, a supply-pipehaving its discharge end located to supply liquid to the primary pan, atank communicating with the secondary pan, a float disposed in saidtank, and a valve in the supply-pipe connected with and operated by saidfloat, substantially as described.

3. In an evaporator, the combination with a furnace, of a corrugated pansupported thereby and having a series of longitudinal hot-air fineslying in said corrugations, a smoke-pipe, a partition dividing the sameinto two different portions, one of said pipe p0rtions communicatingwith the iiues and the other portion communicating directly with thefurnace, communication between the smoke-pipe portions, and a damper forsaid communication, substantially as described.

et. In an evaporator, the combination with a furnace, of a corrugatedpan supported thereby and having a series of longitudinal air-fineslying in said corrugations, the upper surfaces of which are free of thecorrugated bottom of the tank, a smoke-pipe, a partition dividing thesmoke-pipe into two different portions and extending below the same andinto the furnace and having a horizontal flange, one of said sectionscommunicating' with said tlues and the other section communicatingdirectly with the furnace, a damper located between said pan andsmoke-pipe and means for shifting said damper into and out of engagementwith said flange, to open and close communication between the sectionsof the pipe, substantially as described.

5. In an evaporator, the combination with a furnace, of a primary tanksupported thereby and having a dome provided with a pipe opening intosaid dome, a nishing-pan having a corrugated bottom and having a seriesof steam-pipes lying within the corrugations, a su pply-pipe connectedwith the pipe in said dome and communicating with the steampipes in saidfinishing-pan, a secondary pan having open communication with thefirstnamed pan, a tank communicating with the secondary pan, and afloat-valve in said tank connected with the supply-pipe to regulate thepassage of liquid to the primary pan, substantiall y as described.

6. In an evaporator, the combination with a furnace, of a primary panand a secondary pan supported thereon and having open communication,said secondary pan having a corrugated bottom, flues lying in saidcorrugations and opening through the ends of the secondary pan, acut-away portion o n the primary pan affording a passage to said tlues,a supply-pipe for the primary pan, a tank communicating with thefirst-named pan, and a float-valve in said tank and having connectionswith the supply-pipe to regulate the iiow therethrough, substantially asdescribed.

In testimony that I claim the foregoing as my own I have hereto aiiixedmy signature in the presence of two witnesses.

FLAVIUS E. HAYES.

lVitnesses:

C. D. AINGER, M. B. AINGER.

